Discontinued Operations - Narrative (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Apr. 01, 2017	Apr. 30, 2017	Jul. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
General period for obligations under service and commercial contracts			5 years
Everett Transaction | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Shares received by HPE stockholders (in shares)	0.085904
Net cash transfer		$ 559